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Titolo:
Aromatic C-H---S interaction in the arenethiolate complexes of cadmium(II)with S2N2 donor set evidenced from Cd-113 NMR spectroscopy
Autore:
Sun, WY; Shi, XF; Zhang, L; Hu, J; Wei, JH;
Indirizzi:
Nanjing Univ, State Key Lab Coordinat Chem, Inst Coordinat Chem, Nanjing 210093, Peoples R China Nanjing Univ Nanjing Peoples R China 210093 jing 210093, Peoples R China
Titolo Testata:
JOURNAL OF INORGANIC BIOCHEMISTRY
fascicolo: 3-4, volume: 76, anno: 1999,
pagine: 259 - 263
SICI:
0162-0134(19990930)76:3-4<259:ACIITA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
IRON-SULFUR PROTEINS; TETRANUCLEAR CLUSTERS 2; NUCLEAR MAGNETIC-RESONANCE; HYDROGEN-BONDS; REDUCED RUBREDOXIN; SYNTHETIC ANALOGS; ACTIVE-SITES; MODELS; 4-COORDINATE; THIOLATE;
Keywords:
aromatic C-H---S interaction; arenethiolate complexes; cadmium(II) complexes with S2N2 donor set; Cd-113 NMR spectroscopy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Sun, WY Nanjing Univ, State Key Lab Coordinat Chem, Inst Coordinat Chem, Nanjing 210093, Peoples R China Nanjing Univ Nanjing Peoples R China 210093 093, Peoples R China
Citazione:
W.Y. Sun et al., "Aromatic C-H---S interaction in the arenethiolate complexes of cadmium(II)with S2N2 donor set evidenced from Cd-113 NMR spectroscopy", J INORG BIO, 76(3-4), 1999, pp. 259-263

Abstract

Cd-113 NMR spectroscopy was employed to investigate the interactions between aromatic C-H and the coordinated sulfur atom in the neutral four-coordinated cadmium(Il) complexes, [Cd{S-2-(4-X-C6H4CONH)C6H4}(2)(1-MeIm)(2)] (X =H, OMe, F and CN; 1-MeIm = 1-methylimidazole). The coordinating atom set here is S2N2 that is similar to the zinc and iron sites in the known metalloproteins such as zinc finger and ferredoxins, respectively. The observationof Cd-113 NMR signals in the range 480-420 ppm in chloroform at 298 K indicates that the cadmium(II) ion is bound with the S2N2 donor set in solution. The complex without substituent (i.e. X = H) exhibits a Cd-113 NMR signalat 475 ppm while the analog with the strongest electron-withdrawing cyano substituent gives a signal at 424 ppm in chloroform at 298 K. The chemical shifts of cadmium(II) complexes with a variety of substituents had a linearcorrelation with the Hammett sigma(m) values rather than the sigma(p) values, although the substituents are at the para-position of the benzoyl group. The results demonstrate that there an aromatic C-H---S interactions between the protons of the benzoyl group and the coordinated sulfur atom in the cadmium(II) complexes with S2N2 binding site, in addition to the NH---S hydrogen bonds which were confirmed by infrared and H-1 NMR spectroscopies. (C) 1999 Elsevier Science Inc. All rights reserved.

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Documento generato il 26/09/20 alle ore 11:34:30